What are the requirements for sprinkler coverage for baffled ceilings? In Florida we use the 2016 edition of NFPA 13. I know that the sprinklers have to be within 12 inches of ceiling for heat collection. The contractor says the pictures shown are correct. I think they need to place a 12 by 12 above the baffle for heat collection? I found 8.6.3.4 Minimum Distances Between Sprinklers.
If sprinklers are installed above and below the ceiling, a baffle needs to be installed around the lower sprinkler to avoid cold soldering. Cold soldering occurs when discharged water from the sprinkler above cools the thermal element of the sprinkler below, preventing or delaying its activation in the event of the fire. The required baffle will prevent that water from contacting the thermal element of the sprinkler, thus circumventing the possible issue. Talked to some folks and we need the product paperwork as it may mention sprinkler coverage. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
7 Comments
Anthony
8/14/2023 07:33:34 am
It looks like you may be able to use 8.15.14* Open-Grid Ceilings rules. I'm not sure you have the 18'' above the grid ceiling however.
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Dave
8/14/2023 11:06:03 am
Another variation, sometimes for aeshtetic purposes these slatted ceiling systems recieve a black layer of insulation laying over the tops of the slats.
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Glenn Berger
8/14/2023 08:11:13 am
Anthony has an acceptable approach stated above. If an issue still persists, then use obstructed construction rules.
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Jesse
8/14/2023 10:01:49 am
I tell my young designers that at times it will seem architects are the bane of their existence. This is an example of why. I think Anthony is on the right track.
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Dave
8/14/2023 10:56:52 am
Heat collectors / pie tins that us old f**ts were accustomed to were not addressed in NFPA #13 for a long while, but after being proved ineffective (downturned edges actually proved worse) they became prohibited in NFPA 13 several cycles ago.
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Dave
8/14/2023 11:02:37 am
...which I have to teach trainees were different in function and purpose from intermediate level shields
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Janak Patel
8/16/2023 01:43:38 pm
It appears from the photograph that the sprinkler deflector is more than18" from the flat ceiling above. Since beams are so 'closely spaced' (not 7'-6" apart) it will be difficult to apply the Ceiling Pockets rule, NFPA 13 (2019), Section 10.2.9. Therefore, the situation does not comply with NFPA 13.
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